<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8"
    ">
    <title></title>
    <script type="text/javascript" src="https://getfirebug.com/firebug-lite.js"></script>
    <style>
        div {
            width: 100px;
            height: 100px;
            background: red;
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>
